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Registros recuperados : 484 | |
105. | | ROCHA, L. DE S.; SANTANA, R. T. F. de; SOARES, A. C. F.; HADDAD, F. Reaction of banana cultivars to the Meloidogyne javanica X Fusarium oxysporum f. sp. cubense complex. Rev. Caatinga, Mossoró, v. 31, n. 3, p. 572 ?583, jul. /set., 2018. Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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111. | | PEIXOTO, A. L. F.; MOREIRA, F. M.; LOPES, J. P.; HADDAD, F.; ROCHA, L. DE S. Viabilidade e compatibilidade de Trichoderma asperellum. In: CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 15., 2021. Mulheres na ciência desafios, oportunidades e conquistas. Cruz das Almas, BA: Embrapa Mandioca e Fruticultura, 2021. 109 f. il. PDF. Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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116. | | MARÇAL, M. G.; SILVEIRA, R. A. D.; SILVA, G. A.; ROCHA, L. C.; TECHIO, V. H.; MITTELMANN, A. Aspectos citogenéticos dos sítios de rDNA 45S e de bandas CMA/DAPI em hibridos Festulolium. In: CONGRESSO DE INICIAÇÃO CIENTÍFICA DA UFLA, 27., 2014, Lavras. A universidade brasileira e a inovação tecnológica: resumos. Lavras: Universidade Federal de Lavras, 2014. Biblioteca(s): Embrapa Gado de Leite. |
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117. | | OLIVEIRA, R. A.; ROCHA, L. B.; SEDIYAMA, G. C.; PUIATTI, M.; CECON, P. R.; SILVEIRA, S. F. R. Coeficientes de cultura da cenoura irrigada por pivô central, nas condições edafoclimáticas do alto Parnaíba. In: CONGRESSO NACIONAL DE IRRIGAÇÃO E DRENAGEM, 12., Uberlândia, 2002. A inserção da agricultura irrigada no ciclo hidrológico com: segurança alimentar, revitalização hídrica e sustentabilidade ambiental: [anais]. Uberlândia: ABID, 2002 1 CD-ROM Biblioteca(s): Embrapa Hortaliças. |
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118. | | ROCHA, L. C.; DUARTE, R. A.; BUSTAMANTE, F. O.; TORRES, G. A.; MITTELMANN, A.; TECHIO, V. H. Characterization of fragile sites in Lolium perenne L. In: PLANT SCIENCE STUDENT CONFERENCE, 10., 2014, Gatersleben. Program & abstracts. Gatersleben: Institut für Pflanzengenetik und Kulturpflanzenforschung, 2014. Biblioteca(s): Embrapa Gado de Leite. |
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120. | | CHIAVEGATTO, R. B.; CHAVES, A. L. A.; ROCHA, L. C.; BENITES, F. R. G.; PERUZZI, L.; TECHIO, V. H. Heterochromatin Bands and rDNA Sites Evolution in Polyploidization Events in Cynodon Rich. (Poaceae). Plant Molecular Biology Reporter, v. 37, n. 5-6, p. 477-487, 2019. Biblioteca(s): Embrapa Gado de Leite. |
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Registros recuperados : 484 | |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
21/05/2014 |
Data da última atualização: |
05/02/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
BUSTAMANTE, F. O.; ROCHA, L. C.; TORRES, G. A.; DAVIDE, L. C.; MITTELMANN, A.; TECHIO, V. H. |
Afiliação: |
FERNANDA O. BUSTAMANTE, UFLA; LAIANE C. ROCHA, UFLA; GIOVANA A. TORRES, UFLA; LISETE C. DAVIDE, UFLA; ANDREA MITTELMANN, CNPGL; VÂNIA H. TECHIO, UFLA. |
Título: |
Distribution of rDNA in Diploid and Polyploid Lolium multiflorum Lam. and Fragile Sites in 45S rDNA Regions. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Crop Science, v. 54, n. 2, p. 617-625 2014. |
DOI: |
https://doi.org/10.2135/cropsci2013.05.0325 |
Idioma: |
Inglês |
Conteúdo: |
The distribution, number, and location of ribosome DNA (rDNA) regions on chromosomes were evaluated, and transcriptional activity was described in genotypes of Italian ryegrass (Lolium multiflorum Lam.), as well as in an offspring resulting from interbreeding. Nucleoli and nucleolar organizer regions were labeled with silver nitrate and fluorescent in situ hybridization (FISH) was performed with 5S and 45S rDNA as probes. Hybridization procedures were performed on slides previously stained with the Ag-NOR method. The 5S rDNA sites were highly conserved, while 45S rDNA sites had wide variability, even showing more than one site on the same chromosome. One of the genotypes had more than expected 45S rDNA sites. Approximately 95% of the cells at metaphases had at least one chromosome break/gap in the 45S rDNA site, resulting in chromosome fragmentation. Thus, 45S rDNA correspond to fragile sites in L. multiflorum. These events can affect genome organization and cause new chromosomal rearrangements which, along with some other factors, might be responsible for microevolutionary changes involved in differentiation and speciation. Not all 45S rDNA sites are transcriptionally active. Variation in both the number and size of nucleoli and mechanisms of nucleolar fusion were observed in L. multiflorum. |
Palavras-Chave: |
Italian ryegrass. |
Thesagro: |
DNA. |
Categoria do assunto: |
G Melhoramento Genético |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/97916/1/atigo-publicado.pdf
|
Marc: |
LEADER 01983naa a2200217 a 4500 001 1986699 005 2024-02-05 008 2014 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.2135/cropsci2013.05.0325$2DOI 100 1 $aBUSTAMANTE, F. O. 245 $aDistribution of rDNA in Diploid and Polyploid Lolium multiflorum Lam. and Fragile Sites in 45S rDNA Regions.$h[electronic resource] 260 $c2014 520 $aThe distribution, number, and location of ribosome DNA (rDNA) regions on chromosomes were evaluated, and transcriptional activity was described in genotypes of Italian ryegrass (Lolium multiflorum Lam.), as well as in an offspring resulting from interbreeding. Nucleoli and nucleolar organizer regions were labeled with silver nitrate and fluorescent in situ hybridization (FISH) was performed with 5S and 45S rDNA as probes. Hybridization procedures were performed on slides previously stained with the Ag-NOR method. The 5S rDNA sites were highly conserved, while 45S rDNA sites had wide variability, even showing more than one site on the same chromosome. One of the genotypes had more than expected 45S rDNA sites. Approximately 95% of the cells at metaphases had at least one chromosome break/gap in the 45S rDNA site, resulting in chromosome fragmentation. Thus, 45S rDNA correspond to fragile sites in L. multiflorum. These events can affect genome organization and cause new chromosomal rearrangements which, along with some other factors, might be responsible for microevolutionary changes involved in differentiation and speciation. Not all 45S rDNA sites are transcriptionally active. Variation in both the number and size of nucleoli and mechanisms of nucleolar fusion were observed in L. multiflorum. 650 $aDNA 653 $aItalian ryegrass 700 1 $aROCHA, L. C. 700 1 $aTORRES, G. A. 700 1 $aDAVIDE, L. C. 700 1 $aMITTELMANN, A. 700 1 $aTECHIO, V. H. 773 $tCrop Science$gv. 54, n. 2, p. 617-625 2014.
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